From: Sonny Rao <sonny...@chromium.org>
We need to claim the clock which is driving the codec so that when we enable
clock gating, we continue to clock the codec when needed. I make this an
optional clock since there might be some applications where we don't need it
but can still use the I2S block.
Signed-off-by: Sonny Rao <sonny...@chromium.org>
---
sound/soc/rockchip/rockchip_i2s.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/sound/soc/rockchip/rockchip_i2s.c
b/sound/soc/rockchip/rockchip_i2s.c
index c74ba37..2820ade 100644
--- a/sound/soc/rockchip/rockchip_i2s.c
+++ b/sound/soc/rockchip/rockchip_i2s.c
@@ -28,6 +28,7 @@ struct rk_i2s_dev {
struct clk *hclk;
struct clk *mclk;
+ struct clk *oclk;
struct snd_dmaengine_dai_dma_data capture_dma_data;
struct snd_dmaengine_dai_dma_data playback_dma_data;
@@ -439,6 +440,14 @@ static int rockchip_i2s_probe(struct platform_device *pdev)
return PTR_ERR(i2s->mclk);
}
+ i2s->oclk = devm_clk_get(&pdev->dev, "i2s_clk_out");
+ if (IS_ERR(i2s->oclk)) {
+ dev_dbg(&pdev->dev, "Didn't find output clock\n");
+ i2s->oclk = NULL;
+ }
+ if (i2s->oclk)
+ ret = clk_prepare_enable(i2s->oclk);
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(regs))
@@ -505,6 +514,8 @@ static int rockchip_i2s_remove(struct platform_device *pdev)
if (!pm_runtime_status_suspended(&pdev->dev))
i2s_runtime_suspend(&pdev->dev);
+ if (i2s->oclk)
+ clk_disable_unprepare(i2s->oclk);
clk_disable_unprepare(i2s->mclk);
clk_disable_unprepare(i2s->hclk);
snd_dmaengine_pcm_unregister(&pdev->dev);
--
1.9.1
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